ParticulateTrendSouthwestUS.png
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Summary
| Description |
English:
A graph of particulate levels in the atmosphere as determined by the US Environmental Protection Agency
|
| Date | |
| Source | https://www.epa.gov/air-trends/particulate-matter-pm25-trends |
| Author | United States government |
Licensing
|
This image (or other media) is a work of an
Environmental Protection Agency
employee, taken or made as part of that person's official duties. As
works
of the
U.S. federal government
, all EPA images are in the
public domain
.
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